CN208546152U - Well cementation self-oscillation float collar - Google Patents
Well cementation self-oscillation float collar Download PDFInfo
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- CN208546152U CN208546152U CN201820712496.9U CN201820712496U CN208546152U CN 208546152 U CN208546152 U CN 208546152U CN 201820712496 U CN201820712496 U CN 201820712496U CN 208546152 U CN208546152 U CN 208546152U
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- pipe nipple
- shell
- overhead gage
- upper shell
- concussion
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Abstract
The utility model relates to the technical fields of float collar, it is a kind of well cementation self-oscillation float collar, it includes upper shell, lower shell, the lower end of lower shell is connected with top guide, the one-way valve structures that can only be opened from top to bottom are provided in upper shell, turbulence cavity overhead gage, the first concussion pipe nipple are disposed in upper shell below one-way valve structures from top to bottom, the second concussion pipe nipple is provided in lower shell, annular spread has the first protrusion, the second protrusion respectively on the inner wall of the first concussion pipe nipple and the second concussion pipe nipple.The utility model reasonable and compact in structure, pass through the self-oscillation chamber that setting is constituted by swinging chamber overhead gage, the first concussion pipe nipple, the second concussion pipe nipple in upper shell and lower shell, low frequency self-oscillation occurs for the cement slurry that can flow through this region, to drive entire bunch tube in well that low-frequency vibration occurs, it can effectively improve the compaction rate of replacement efficiency and later period cement slurry, so as to effectively improve cementing quality.
Description
Technical field
The utility model relates to the technical fields of float collar, are a kind of well cementation self-oscillation float collars.
Background technique
The well of the special operation conditions such as gas well, small annular clearance, if with conventional well cementation float collar, it is easy to by drilling fluid displacing
The influence of efficiency and cement slurry property fluctuation generates well cementation defect in well cementing process, once there is critical defect, it will be very big
Ground influence oil well follow-up work development, therefore in recent years, improve gas well cementing matter quantifier elimination with apply it is upper, can improve
Annular space drilling fluid displacing efficiency and the special cementing unit for improving cement slurry property are concerned.
Summary of the invention
The utility model provides a kind of well cementation self-oscillation float collar, overcomes the defects of the prior art, energy
Conventional cementing float collar is effectively solved when facing the well cementing operation of special operation condition, it is easy to because of drilling fluid displacing efficiency and cement
Starch performance the reason of cause cement the well defect the problem of.
The technical solution of the utility model is realized by following measures: a kind of well cementation self-oscillation float collar includes
Upper shell, lower shell, the lower end of upper shell are fixedly connected with the upper end of lower shell, and the lower end of lower shell is connected with top guide,
Top guide is hemispherical shell, and at least provided with a circulation through-hole on top guide, being provided in upper shell can only be from top to bottom
The one-way valve structures of opening are disposed with turbulence cavity overhead gage, first in the upper shell below one-way valve structures from top to bottom
Shake pipe nipple, be provided with the second concussion pipe nipple in lower shell, turbulence cavity overhead gage, the first concussion pipe nipple, the second concussion pipe nipple from
It is fixedly connected sequentially under, first is provided in the middle part of turbulence cavity overhead gage and crosses recirculation hole, is provided on the inner wall of upper shell
The first step of turbulence cavity overhead gage upper surface is limited, is provided on the inner wall of lower shell and limits the second turbulence cavity pipe nipple lower end surface
Second step, on inner wall of the first concussion pipe nipple with the second concussion pipe nipple respectively annular spread have it is first raised, second convex
It rises.
Here is the further optimization and/or improvements to above-mentioned utility model technical solution:
Above-mentioned one-way valve structures include overhead gage, lower baffle plate, spool, and overhead gage and lower baffle plate are threaded in cylinder respectively
It is provided with second on the inner wall of body, in the middle part of overhead gage and crosses recirculation hole, spool, spool are provided between overhead gage and lower baffle plate
It is made of valve head and valve rod, the upper surface of valve head in canopy shape and can seal the first mistake recirculation hole, and valve rod is connected to valve head vertically
Lower end surface on, be provided with mounting hole corresponding with valve rod on lower baffle plate, the lower part of valve rod is arranged in mounting hole, in valve rod
Outer sheath spring is housed, the upper end of spring presses against on the lower end surface of valve head, and the lower end of spring presses against the upper end of lower baffle plate
On face, recirculation hole is crossed at least provided with a third on the lower baffle plate of spring outwards.
Sealing ring is provided between above-mentioned valve rod and mounting hole.
All in low inside and high outside skewed, the first two sides up and down for crossing recirculation hole are all set for above-mentioned first protrusion and the second protrusion
It is equipped with chamfering.
It is provided with external screw thread on outer wall at above-mentioned upper shell upper port, is threadedly coupled between upper shell and lower shell,
Turbulence cavity overhead gage, the first concussion pipe nipple, the second concussion pipe nipple are successively threadedly coupled from top to bottom.
The utility model reasonable and compact in structure, by being arranged in upper shell and lower shell by swinging chamber overhead gage, first
Shake pipe nipple, the self-oscillation chamber that the second concussion pipe nipple is constituted, the cement slurry that can flow through this region occurs low frequency and impulses certainly
It swings, to drive entire bunch tube in well that low-frequency vibration occurs, can effectively improve the closely knit of replacement efficiency and later period cement slurry
Degree, so as to effectively improve cementing quality.
Detailed description of the invention
Attached drawing 1 is main view half section schematic of the best embodiment of the utility model when float shoe fuse is closed.
Attached drawing 2 is main view half section schematic of the best embodiment of the utility model when float shoe fuse is opened.
Coding in attached drawing is respectively as follows: 1 for upper shell, and 2 be lower shell, and 3 be top guide, and 4 be circulation through-hole, and 5 be turbulence cavity
Overhead gage, 6 be the first concussion pipe nipple, and 7 be the second concussion pipe nipple, and 8 cross recirculation hole for first, and 9 be first step, and 10 be second
Rank, 11 be the first protrusion, and 12 be the second protrusion, and 13 be overhead gage, and 14 be lower baffle plate, and 15 cross recirculation hole for second, and 16 be valve head,
17 be valve rod, and 18 be mounting hole, and 19 be spring, and 20 cross recirculation hole for third.
Specific embodiment
The utility model is not limited by following embodiments, can technical solution according to the present utility model and actual conditions
Determine specific embodiment.
In the present invention, for ease of description, the description of the relative positional relationship of each component is according to specification
The Butut mode of attached drawing 1 is described, such as: the positional relationship of upper and lower, left and right is the Butut according to Figure of description 1
Direction determines.
The utility model is further described below with reference to examples and drawings:
As shown in attached drawing 1,2, which includes upper shell 1, lower shell 2, the lower end of upper shell 1 with
The upper end of lower shell 2 is fixedly connected, and the lower end of lower shell 2 is connected with top guide 3, and top guide 3 is hemispherical shell, top guide 3
On at least provided with a circulation through-hole 4, the one-way valve structures that can only be opened from top to bottom are provided in upper shell 1, unidirectionally
Turbulence cavity overhead gage 5, first is disposed in upper shell 1 below valve arrangement from top to bottom and shakes pipe nipple 6, in lower shell 2
It is provided with the second concussion pipe nipple 7, turbulence cavity overhead gage 5, first shakes the concussion pipe nipple 7 of pipe nipple 6, second successively to be fixed from top to bottom
Connection, the middle part of turbulence cavity overhead gage 5 are provided with first and cross recirculation hole 8, be provided with and limited on turbulence cavity on the inner wall of upper shell 1
The first step 9 of 5 upper surface of baffle is provided with second for limiting the second turbulence cavity pipe nipple lower end surface on the inner wall of lower shell 2
Rank 10, annular spread has first the 11, second protrusion of protrusion respectively on the inner wall of the first concussion pipe nipple 6 and the second concussion pipe nipple 7
12。
In actual use, cement slurry from top to bottom enters in upper shell 1 from one-way valve structures, then passes through
Pipe nipple 6, second is shaken by turbulence cavity overhead gage 5, first and shakes the self-oscillation chamber that pipe nipple 7 is constituted, finally from following on top guide 3
It is flowed out at ring through-hole 4, cement slurry is when by self-oscillation chamber, due to the effect of the first protrusion 11 and the second protrusion 12, cement
Low frequency self-oscillation can occur for slurry, to drive entire bunch tube in well that low-frequency vibration occurs, can effectively improve replacement efficiency
With the compaction rate of later period cement slurry, so as to effectively improve cementing quality.
Above-mentioned well cementation can be made further optimization and/or improvements with self-oscillation float collar according to actual needs:
As shown in attached drawing 1,2, one-way valve structures include overhead gage 13, lower baffle plate 14, spool, overhead gage 13 and lower baffle plate 14
Be threaded on the inner wall of upper shell 1 respectively, the middle part of overhead gage 13 be provided with second cross recirculation hole 15, overhead gage 13 with
Spool is provided between lower baffle plate 14, spool is made of valve head 16 and valve rod 17, and the upper surface of valve head 16 is in canopy shape and can be close
Envelope first crosses recirculation hole 8, and valve rod 17 is connected to vertically on the lower end surface of valve head 16, is provided on lower baffle plate 14 opposite with valve rod 17
The lower part of the mounting hole 18 answered, valve rod 17 is arranged in mounting hole 18, and spring 19 is housed in the outer sheath of valve rod 17, spring 19
Upper end presses against on the lower end surface of valve head 16, and the lower end of spring 19 presses against on the upper surface of lower baffle plate 14, in 19 outside of spring
Lower baffle plate 14 at least provided with a third cross recirculation hole 20.
The form of one-way valve structures has very much, and the present embodiment is one such structure type, and cement slurry pushes valve head
16 move downward simultaneously compressed spring 19 with valve rod 17, open to make second to cross recirculation hole 15, so that cement slurry smoothly enters
Into upper shell 1, second crosses recirculation hole 15 when opening, and spring 19 is constantly in confined state, enters in upper shell 1
The third that cement slurry flows through on lower baffle plate 14 crosses recirculation hole 20, finally crosses recirculation hole 8 by first and enters self-oscillation chamber, if
Cement slurry reverse flow from bottom to up, under the impact force of 19 elastic force of spring and cement slurry, umbraculiferous valve head 16 can be again
It closes second and crosses recirculation hole 15, prevent cement slurry from flowing back, and then realize the effect of one-way flow, it is ensured that well cementation is safe and solid
Well quality, its structure type of this one-way valve structures is simple, stable working performance, has stronger practicability.
According to actual needs, sealing ring is provided between valve rod 17 and mounting hole 18.The utility model can be improved in this way
Airtightness, make cement slurry according to set route proper flow, it is ensured that well cementing process is gone on smoothly.
As shown in attached drawing 1,2, the first protrusion 11 and the second protrusion 12 are all in low inside and high outside skewed, the first mistake recirculation hole
8 two sides up and down are both provided with chamfering.Design can be more conducive to that cement slurry is made to generate low frequency when flowing through turbulence cavity certainly in this way
It impulses and swings effect.
As shown in attached drawing 1,2, be provided with external screw thread on the outer wall at 1 upper port of upper shell, upper shell 1 and lower shell 2 it
Between for be threadedly coupled, turbulence cavity overhead gage 5, first shake pipe nipple 6, second shake pipe nipple 7 be successively threadedly coupled from top to bottom.
Threaded connection is very common type of attachment, can greatly easy to disassemble and installation process.
The above technical characteristic constitutes the most preferred embodiment of the utility model, with stronger adaptability and best implementation
Effect can increase and decrease non-essential technical characteristic, according to actual needs to meet the needs of different situations.
The use process of the best embodiment of the utility model:
Upper shell 1 is connected to the end of bunch tube surely, when replacing cement slurry using huge discharge, cement slurry pushes valve head
16 move downward simultaneously compressed spring 19 with valve rod 17, so that opening second crosses recirculation hole 15, cement slurry are made to enter upper shell 1
It is interior, and enter eventually into self-oscillation chamber, low frequency self-oscillation can occur when flowing through this region for cement slurry, and this low frequency is certainly
Impulsing to swing will drive the utility model and entire lower part casing string micro-vibration occurs, and the drilling fluid for flowing into annular space can also occur centainly
Vibration, the shear action that shock effect generates can reduce the viscosity and shear force of drilling fluid, the elimination efficiency of mud cake be improved, to mention
The replacement efficiency of high cement slurry creates condition.
During cement slurry replaces drilling fluid, the drilling fluid being detained on the borehole wall can be effectively reduced or eliminated, hence it is evident that mention
High interface agglutination quality, cement slurry pass through low-frequency vibration, can greatly reduce the gap in cement slurry and bubble, avoid water
Its inside is in honeycomb to mud after solidification, improves the performance of cement slurry, improves the compaction rate of cement slurry, and now
It is had confirmed by experiment, under low-frequency vibration effect, it is prone to the cement slurry just final set transition time of bottoms stream intrusion
Section shortens nearly one third, alters slot, whole device structure conducive to the formation fluid that solidifying pressure is steady, high-pressure reservoir is inhibited to be likely to occur is waited
Simply, easy for installation, cementing quality can be effectively improved.
Claims (6)
1. a kind of well cementation self-oscillation float collar, it is characterised in that including upper shell, lower shell, the lower end of upper shell and lower shell
Upper end be fixedly connected, the lower end of lower shell is connected with top guide, and top guide is hemispherical shell, on top guide at least provided with
One circulation through-hole, is provided with the one-way valve structures that can only be opened from top to bottom in upper shell, upper below one-way valve structures
Turbulence cavity overhead gage, the first concussion pipe nipple are disposed in cylinder from top to bottom, is provided with the second concussion pipe nipple in lower shell,
Turbulence cavity overhead gage, the first concussion pipe nipple, the second concussion pipe nipple are fixedly connected sequentially from top to bottom, the middle part of turbulence cavity overhead gage
It is provided with first and crosses recirculation hole, the first step for limiting turbulence cavity overhead gage upper surface, lower cylinder are provided on the inner wall of upper shell
The second step for limiting the second turbulence cavity pipe nipple lower end surface is provided on the inner wall of body, it is short in the first concussion pipe nipple and the second concussion
Annular spread has the first protrusion, the second protrusion respectively on the inner wall of section.
2. it is according to claim 1 well cementation use self-oscillation float collar, it is characterised in that one-way valve structures include overhead gage, under
Baffle, spool, overhead gage and lower baffle plate are threaded in respectively on the inner wall of upper shell, and the second mistake is provided in the middle part of overhead gage
Recirculation hole is provided with spool between overhead gage and lower baffle plate, and spool is made of valve head and valve rod, and the upper surface of valve head is in canopy
It shape and first can be sealed crosses recirculation hole, valve rod is connected on the lower end surface of valve head vertically, is provided on lower baffle plate opposite with valve rod
The lower part of the mounting hole answered, valve rod is arranged in mounting hole, spring is housed in the outer sheath of valve rod, the upper end of spring presses against valve
Head lower end surface on, the lower end of spring presses against on the upper surface of lower baffle plate, on the lower baffle plate of spring outwards at least provided with
One third crosses recirculation hole.
3. well cementation self-oscillation float collar according to claim 2, it is characterised in that be provided between valve rod and mounting hole
Sealing ring.
4. well cementation self-oscillation float collar according to claim 1 or 2 or 3, it is characterised in that the first protrusion and second convex
It rises all in low inside and high outside skewed, the first two sides up and down for crossing recirculation hole are both provided with chamfering.
5. well cementation self-oscillation float collar according to claim 1 or 2 or 3, it is characterised in that at upper shell upper port
External screw thread is provided on outer wall, to be threadedly coupled between upper shell and lower shell, turbulence cavity overhead gage, first shake pipe nipple, the
Two concussion pipe nipples are successively threadedly coupled from top to bottom.
6. well cementation self-oscillation float collar according to claim 4, it is characterised in that on the outer wall at upper shell upper port
It is provided with external screw thread, is threadedly coupled between upper shell and lower shell, turbulence cavity overhead gage, the first concussion pipe nipple, the second concussion
Pipe nipple is successively threadedly coupled from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820712496.9U CN208546152U (en) | 2018-05-14 | 2018-05-14 | Well cementation self-oscillation float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820712496.9U CN208546152U (en) | 2018-05-14 | 2018-05-14 | Well cementation self-oscillation float collar |
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| Publication Number | Publication Date |
|---|---|
| CN208546152U true CN208546152U (en) | 2019-02-26 |
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ID=65421248
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820712496.9U Active CN208546152U (en) | 2018-05-14 | 2018-05-14 | Well cementation self-oscillation float collar |
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| Country | Link |
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| CN (1) | CN208546152U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756808A (en) * | 2018-05-14 | 2018-11-06 | 中国石油集团西部钻探工程有限公司 | Well cementation self-oscillation float collar |
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2018
- 2018-05-14 CN CN201820712496.9U patent/CN208546152U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108756808A (en) * | 2018-05-14 | 2018-11-06 | 中国石油集团西部钻探工程有限公司 | Well cementation self-oscillation float collar |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201110 Address after: 100120 Beijing Xicheng District six laying Kang Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd. Address before: 830026 science and technology management division, West drilling and Drilling Engineering Institute, No. 326 South Central Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region, China Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |